Abstract: Seasonal and Diurnal Dynamics of N2O and CO2 Emissions in No-till Winter Wheat System in Pacific Northwest. (ASA, CSSA and SSSA International Annual Meetings)

373-2 Seasonal and Diurnal Dynamics of N2O and CO2 Emissions in No-till Winter Wheat System in Pacific Northwest.

See more from this Division: ASA Section: Environmental Quality
See more from this Session: Improving Accuracy and Precision of Soil Carbon and Greenhouse Gas Emission Measurements and Quantification: I

Wednesday, November 5, 2014: 10:30 AM

Long Beach Convention Center, Room 203A

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Kirill Kostyanovsky¹, David R. Huggins², Claudio O. Stockle³, David Brown³, Sarah Rachel Waldo⁴ and Brian Lamb³, (1)Washington State University, Washington State University, Pullman, WA
(2)USDA-ARS, Pullman, WA
(3)Washington State University, Pullman, WA
(4)405 Spokane Street., P.O. Box 642910, Washington State University, Pullman, WA

An accurate assessment of seasonal and diurnal fluctuations of N₂O emissions in the in situ conditions is required for predicting the effects of agricultural management practices on global climate change. We established a long-term monitoring study in the no-till winter wheat site to measure the emissions of nitrous oxide immediately following planting and aqua-N fertilizer application at the Cook Agronomy Farm near Pullman, WA in October 2013. The measurement setup included the Li-Cor 8100A combined with the LGR 23r N₂O analyzer and 16 long-term Li-Cor chambers placed in 4 replications at four elevation positions along the slope. Experiment ran continuously through October 2013 to July 2014. The effects of freeze-thaw events, snowfall, rainfall and the daily temperature fluctuations on emissions of N₂O are being evaluated.

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